10 Best Marine Flashlights 2025 in the United States

The Streamlight 66134 Stylus Pro USB is a compact and powerful flashlight that is well-suited for various outdoor activities, including marine use. With a waterproof rating of IPX4, it can handle splashes of water, which is beneficial for marine environments, though it may not be fully submersible. Its 350 lumens provide bright illumination with a peak beam intensity of 2950 candela, reaching a distance of 109 meters, making it effective for spotting objects from afar.

The flashlight is constructed from durable anodized machined aircraft aluminum, ensuring it can withstand harsh conditions. Weighing just 1.76 ounces and measuring under 6 inches in length, it's lightweight and easy to carry, fitting well in pockets or small bags. The inclusion of a rechargeable lithium-ion battery and a USB cord adds convenience, allowing for quick recharging without the need for replacement batteries.

There are some drawbacks to keep in mind. The runtime on high mode is limited to just 1.5 hours, which may not be ideal for extended outings unless you have a way to recharge it. Additionally, while the sliding metal sleeve protects the USB port, users need to ensure it's properly sealed to maintain water resistance. The flashlight also does not come with standalone lithium batteries.

The Fenix PD36R Pro is a robust tactical flashlight that stands out for its impressive brightness of up to 2800 lumens and a beam distance of 415 yards, making it highly effective for marine use where visibility is critical. Its waterproof rating ensures it can withstand wet conditions, a key feature for users in marine environments. Users can appreciate the long battery life, with up to 42 hours of run time on lower settings, and the convenience of USB-C recharging, which allows for quick power-ups when needed.

One of the flashlight’s significant advantages is its dual rear switches that enable one-handed operation, allowing users to adjust brightness levels or activate strobe mode quickly. This is particularly helpful in emergency situations. The design also promotes everyday carry, with options to attach it to bags, belts, or use the included holster, making it versatile for outdoor adventures on water.

It is essential to consider some drawbacks. The flashlight, while compact, is somewhat heavier than other models at 6.08 ounces, which may be noticeable during extended use. Additionally, while its high brightness is excellent for visibility, the maximum brightness can drain the battery quickly, requiring careful management of settings during prolonged activities. The price point may also be higher compared to more basic models, which might not be justified for casual users who don’t need advanced features.

The OLIGHT Warrior 3S is a robust tactical flashlight with several features that make it appealing for various uses, including emergency situations, everyday carry (EDC), and searching. It boasts a powerful 2300 lumens output and a beam distance of 300 meters, ensuring a bright and far-reaching light. Its built-in proximity sensor is a thoughtful addition, preventing overheating and potential damage by automatically reducing brightness when objects are too close.

This flashlight is also weatherproof, enhancing its durability in harsh conditions. The dual-switch design allows for versatile usage, with a side switch offering six different light modes and a tail switch for tactical operations. Magnetic charging simplifies the recharging process, and the included customized rechargeable battery adds to the convenience.

Weighing 6.2 ounces and made of durable aluminum, the flashlight is relatively lightweight and sturdy, suitable for prolonged use. Given its high brightness, long beam distance, and durability, this flashlight is best suited for those involved in outdoor activities, self-defense, and law enforcement.